Reference Data Rate Center Directory CHAPIN, IL Rate Center CHAPIN — IL Data last updated: March 10, 2026 LATA 376 State IL Area Codes 2 Exchanges (NXX) 2 Carriers 2 Coordinates 39.76666353963686, -90.40120967289931 Area Codes 217 447 Top Carriers Carrier OCN NXX Count FRONTIER NORTH, INC. - IL 1015 1 ONVOY, LLC 224C 1